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The erratic motion of pollen grains and other tiny particles suspended in liquid is known as Brownian motion, after its discoverer, Robert Brown, a botanist who worked in 1828, in London. He turned over the problem of why this motion occurred to physicists who were investigating kinetic theory and thermodynamics;

Authors: Farenick, DouglasTailored to novice mathematicians and non-specialists who wish to learn functional analysis with minimal prerequisitesContains many interesting examples and challenging exercisesCovers a selection of topics that, while decades old, are of lasting value to both pure and applied mathematicsPresents an outstanding treatment of Banach spaces and operator theory, being written by a specialist in these areas